#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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//
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// boost/detail/atomic_count_win32.hpp
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//
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// Copyright (c) 2001-2005 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <boost/smart_ptr/detail/sp_interlocked.hpp>
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#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
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#include <boost/config/pragma_message.hpp>
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BOOST_PRAGMA_MESSAGE("Using Win32 atomic_count")
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#endif
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namespace boost
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{
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namespace detail
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{
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class atomic_count
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{
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public:
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explicit atomic_count( long v ): value_( v )
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{
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}
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long operator++()
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{
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return BOOST_SP_INTERLOCKED_INCREMENT( &value_ );
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}
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long operator--()
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{
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return BOOST_SP_INTERLOCKED_DECREMENT( &value_ );
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}
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operator long() const
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{
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return static_cast<long const volatile &>( value_ );
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}
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private:
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atomic_count( atomic_count const & );
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atomic_count & operator=( atomic_count const & );
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long value_;
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};
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} // namespace detail
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} // namespace boost
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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